using System;
using System.Globalization;
using System.Windows.Forms;

public static class Program {
	public static void Main() {
		Decimal price = 123.54M;
		String s = price.ToString("C", new CultureInfo("vi-VN"));
		MessageBox.Show(s);

		s = price.ToString("C", CultureInfo.InvariantCulture);
		MessageBox.Show(s);
	}
}
